Pyridone-methide azo dyestuffs

ABSTRACT

Dyestuffs of the formula wherein D is the radical of a carbo- or heterocyclic diazo component, X represents O, NH, NT, NCOT, NCCH2T or NSO2T, and the other substituents have the meaning given in the description, are preferably suitable, if m=n=l=o, for dyeing and printing hydrophobic synthetic fiber materials and mixtures thereof with naturally occurring fiber materials.

This is a division of Ser. No. 08/715,667 filed Sep. 18, 1996, now U.S. Pat. No. 5,808,015.

The invention relates to pyridone-methide azo dyestuffs, processes for their preparation, their use and coupling components containing pyridone-methide.

Azo dyestuffs which contain a coupling component based on methylene-triazolo-pyridines are already known from DE-A 4 020 768 and DE-A 4 329 296. However, these azo dyestuffs still have some disadvantages in their use. Thus, for example, their build-up capacity and their stability in the dyebath when used for dyeing polyester is not satisfactory.

Pyridone-methide azo dyestuffs have now been found, which, in the form of the free acid, correspond to the formula (I) or its tautomeric forms ##STR1## wherein D is the radical of a carbo- or heterocyclic diazo component,

A¹ and A² independently of one another denote H or a substituent typical for pyridones,

A³ and A⁴ independently of one another denote an electron-withdrawing radical, or, together with the common C atom, form a cyclic methylene-active compound,

A⁵ represents H or a radical of the formula T, -OT¹, -NH₂, -NHT, -NT₂, -NHCOH, -NHCOT, -N═CH-T, -N═CT₂ or NHSO₂ T,

wherein

T¹ =alkyl, cycloalkyl or aralkyl, and T represents T¹ or can assume the meaning of T² to T⁵, where T² =alkenyl,

T³ =alkinyl,

T⁴ =aryl,

T⁵ =hetaryl or

A¹ and A¹ and/or

A² and A³ and/or

A⁴ and A⁵, together with the particular atoms in between, form an unsaturated, optionally substituted 5- or 6-membered carbo- or heterocyclic radical, with the proviso that if a ring is formed with participation of one of the two radicals A³ and A⁴, the radical which does not participate denotes an electron-withdrawing radical,

X represents O, NH, NT, NCOT, NCO₂ T or NSO₂ T,

K.sup.⊕ is -NH₃.sup.⊕, -NHT₂.sup.⊕, -NH₂ T.sup.⊕, -NT₃.sup.⊕ or a cycloimmonium ion,

B.sup.⊖ is an anion,

Z is a fibre-reactive radical,

l represents 0 to 2,

m represents 0 to 8 and

n represents 0 to 6.

Preferred pyridone-methide azo dyestuffs are those which correspond to the formula (I) or its tautomeric form wherein

A¹ and A² independently of one another denote H or a radical of the formula T, -COH, -CO-T, -CO₂ T, -CN, -CONH₂, -CONHT, -CONT₂, CF₃, -NH₂, -NHT, -NT₂, -NH-COT, -NT-COT, -NHSO₂ T, -NTSO₂ T, -NO₂, -NO, -SO₂ T, -OH, -OT, -OCOT, -OCO₂ T, -OSO₂ T, Cl, Br or I

wherein

T can assume the meaning of T¹, T², T³, T⁴ or T⁵.

The dyestuffs of the formula (I) according to the invention can exist in various tautomeric forms. One form corresponds, for example, to the formula (I), another corresponds, for example, to the following formula ##STR2##

An electron-withdrawing radical is preferably understood as meaning a radical of which the Hammett substituent constant σ (para) is >0, one of the two substituents A³ or A⁴ preferably having a σ (para) value >0.300. An appropriate list of Hammett substituent constants is to be found, for example, in Sykes, Reaktionsmechanismen der organischen Chemie Reaction mechanisms of organic chemistry!, 9th Edition, Weinheim, VCH Verlagsgesellschaft, 1988, or can be determined by known methods.

T¹ preferably represents C₁ -C₂₀ -alkyl, C₄ -C₈ -cycloalkyl or C₆ -C₁₀ -aryl-C₁ -C₈ -alkyl, each of which is unsubstituted or substituted by one or more substituents from the group consisting of OH, C₁ -C₁₀ -alkoxy, ##STR3## -OCOH, COH, -OCOT, -OSO₂ T, -O(CH₂ CH₂ O)₁₋₆ COT, -OCO₂ T, COT, -SO₂ T, -CO₂ T, -CN, -CONH₂, -CONHT, -CONT₂, -CO₂ H, -SO₂ NH₂, -SO₂ NHT, -SO₂ NT₂, -CF₃, -NO₂ and halogen.

T² and T³ independently of one another preferably represent C₂ -C₂₀ -alkenyl or C₂ -C₂₀ -alkinyl, each of which is unsubstituted or substituted by one or more substituents from the group of substituents already mentioned under T¹.

T⁴ preferably represents C₆ -C₁₆ -aryl, which is unsubstituted or substituted by one or more substituents from the group of substituents already mentioned under T¹, further possible substituents being -NH₂, -NHT, -NT₂, -NHCOH, -NHCOT, NHSO₂ T, C₂ -C₁₀ -alkenyl, C₂ -C₁₀ -alkinyl, C₁ -C₁₀ -alkyl, C₄ -C₈ -cycloalkyl and C₆ -C₁₀ -aryl-C₁ -C₆ -alkyl.

T⁵ preferably represents a 5- or 6-membered aromatic heterocyclic radical which contains 1 to 3 identical or different hetero atoms from the group consisting of N, O, S, NH, SO and SO₂ and is unsubstituted or substituted by one or more substituents from the group of substituents already mentioned under T¹ and is optionally fused with one or two aryl or hetaryl rings.

Preferred dyestuffs of the formula (I) are those wherein l=1 or 2 and n=0, and m is less than 1, and is preferably 0, which are called "cationic dyestuffs" of the formula (I) below.

Dyestuffs which are likewise preferred are those of the formula (I) wherein l=m=n=0, which are called "disperse dyestuffs of the formula (I)" below.

Dyestuffs which are furthermore preferred are those of the formula (I) wherein l=0 and m and/or n are not equal to 0. These dyestuffs according to the invention are called "acid dyestuffs of the formula (I)" below, if n is 0, and "reactive dyestuffs of the formula (I)" below, if n is not equal to 0.

Acid dyestuffs of the formula I are also understood as meaning those which carry COOH groups and wherein m is 0.

Disperse dyestuffs

Preferred disperse dyestuffs of the formula (I) are those in which

A³ and A⁴ independently of one another represent -CN, -CO₂ T, -CONH₂, -CONHT, -CONT₂, CF₃, -CHO, -COT, -SO₂ T, -SO₃ T⁴, -SO₃ T⁵, SO₂ NH₂, SO₂ NHT, SO₂ NT₂, -SOT, -CH═NH, -CH═NT, -CT═NH, -CT═NT, ##STR4## -CO-CO₂ T, -NO₂, NO, T⁴ or T⁵, wherein A³ and A⁴ preferably do not simultaneously represent T⁴ and/or T⁵, or

A³ and A⁴, together with the C atom to which they are bonded, represent a cyclic methylene-active compound of the formula (IIa) to (IIv),

where these radicals are shown in the form of ##STR5## wherein

V¹ represents H or a substituent, in particular Cl, Br, CH₃, -CO₂ T¹, -CN, -NO₂, -CF₃ or -SO₂ T¹, and wherein A¹, A², A⁵, D and X have the abovementioned meanings.

Preferred disperse dyestuffs of the formula (I) are those wherein

A¹ represents H, T, -COH, -COT, -CO₂ T, -CN, -CONH₂, -CONH₂, -CONHT, -CONT₂, CF₃, OH or halogen, in particular Cl, Br and I,

A² represents H, T, -COH, -COT, -CN, -CO₂ T, -CONH₂, -CONHT, -CONT₂, -CF₃, -NO₂, -NO, Cl, Br or I,

A³ and A⁴ independently of one another represent -CN, -CO₂ T, -CONH₂, -CONHT, -CONT₂, CF₃, -CHO, -COT, -SO₂ T, -SO₃ T⁴, -SO₃ T⁵, SO₂ NH₂, SO₂ NHT, SO₂ NT₂, -SOT, -CH═NH, -CH═NT, -CT═NH, -CT═NT, -CO-CO₂ T, -NO₂, -NO, T⁴ or T⁵, wherein A³ and A⁴ preferably do not simultaneously represent T⁴ and/or T⁵, or

A² and A³, together with the C atoms in between them, form the radical of a fused indene ring which is optionally substituted by R¹, or

A³ and A⁴, together with the C atom to which they are bonded, form a carbocyclic or heterocyclic radical of the formula (IIa) to (IIv),

A⁵ denotes H, T¹, T², T³, T⁴, -NH₂, -NHT, NT₂, -NHCOT , -NHCOH, -NHSO₂ T or -N═CT₂ or A⁴ and A⁵, together with the atoms of the pyridone ring in between, form a fused ring of the formula ##STR6## wherein the N atom labelled with corresponds to the pyridone nitrogen, T¹ denotes C₁ -C₁₀ -alkyl, C₅ -C₇ -cycloalkyl or C₆ -C₁₀ -aryl-C₁ -C₆ -alkyl, which are optionally substituted by one or more substituents from the group consisting of -OH, -C₁ -C₁₀ -alkoxy, -O (CH₂)₂₋₁₀ -O!₁₋₆ -alkyl, in particular -C₁ -C₁₀ -alkoxy-C₂ -C₅ -alkoxy, -C₁ -C₅ -alkoxy-C₂ -C₅ -alkoxy-C₂ -C₅ -alkoxy or -O-(CH₂ -CH₂ O)₁₋₆ -alkyl, -OCOT, -OSO₂ T, -O-(CH₂ -CH₂ O)₁₋₆ -COT, -COT, -SO₂ T, -CO₂ T, -CN, -CO₂ H, -CONT₂, -CF₃, Cl, Br and I,

T² and T³ independently of one another denote C₂ -C₁₀ -alkenyl or alkinyl, which are optionally substituted by one or more substituents from the group consisting of OH, -C₁ -C₆ -alkoxy, -OCOT, -OCOH, -CO₂ T, -CO₂ H, -CN, Cl, Br and I,

T⁴ denotes phenyl, which is optionally substituted by one or more substituents such as -C₁ -C₁₀ -alkoxy, -(O-C₂ -C₁₀ -alkylene)₀₋₁ -O-(C₂ -C₅ -alkylene)₁₋₆ -O-(C₂ -C₅ -alkyl) in particular C₁ -C₁₀ -alkoxy-C₂ -C₅ -alkoxy, C₁ -C₅ -alkoxy-C2-C₅ -alkoxy-C₂ -C₅ -alkoxy, -OCOH, -OCOT, -OSO₂ T, -COH, -COT, -SO₂ T, -CO₂ T, -CN, -CF₃, -CCl₃, -NO₂, -NO, -CO₂ H, -CONH₂, -CONHT, -CONT₂, -SO₂ NT², -C₁ -C₁₀ -alkyl, optionally substituted by -OH, -CN, -CO₂ -C₁ -C₆ -alkyl, Cl, Br or I, -C₂ -C₁₀ -alkenyl, optionally substituted by -OH, -CN, -CO₂ -C₁ -C₆ -alkyl, Cl, Br or I, and -C₂ -C₁₀ -alkinyl, optionally substituted by C₁ -C₁₀ -alkoxy, -OH, -OCOH, -OCOT, Cl, Br or I,

T⁵ denotes thiophene, furan, pyrrole, 1,2-isothiazole, 1,3-thiazole, pyrrazole, oxazole, isooxazole, imidazole, triazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazine, benzothiazole, benzimidazole, benzoxazole, quinoline, isoquinoline, indole, coumarone, thionaphthene or tetrazole, optionally substituted by 1 to 3 substituents such as are already described as substituents for phenyl,

X denotes O, -NCOT, -NCO₂ T or -NSO₂ T,

D denotes a radical of the formula (IIIa) to (IIIu) ##STR7##

R¹, R², R³, R⁴, R⁵ and R⁶ independently of one another and denotes H, T, F, Cl, Br, I, -CN, -NO₂, -CH═O, -COT, -CO₂ T¹, -CONH₂, -CONHT, CONT₂, -CF₃, -SO₂ NH₂, -SO₂ NHT, -SO₂ NT₂, -SOT, -SO₂ T, -SO₃ T, -OT, -OH, -OCOT, -OCO₂ T, -OSO₂ T, -NH₂, -NHT, -NT₂, ##STR8## -NHCOH, -NHCOT, -NHSO₂ T or -COCO₂ T, wherein R³ can additionally denote -N═N-T⁴ or -N═N-T⁵ and

R⁶ can additionally denote ST.

Particularly preferred disperse dyestuffs of the formula (I) are those wherein

A¹ denotes H, T¹, T⁴ or -CF₃,

A² denotes H, -CN, -CO₂ T¹, -CONHT¹ or -CF₃,

A³ and A⁴ independently of one another denote -CN-, -CO₂ T¹, -CONHT¹, -CF₃, -CHO, -COT, -SO₂ T, -NO₂, -T⁴ or -T⁵,

wherein A³ and A⁴ do not simultaneously represent T⁴ or T⁵,

A³ and A⁴, together with the C atom to which they are bonded, form a cyclic methylene-active compound of the formula (IIa), (IId) or (IIh), where the radicals of the cyclic methylene-active compound are shown in the form of ##STR9## A⁵ is H, T¹, T² or T⁴, or A⁴ and A⁵, together with the atoms in between, form a fused ring of the formula ##STR10## in which the N atom marked with * corresponds to the pyridone nitrogen, D denotes a radical of the formula ##STR11## wherein R¹ and R⁵ independently of one another represent H, CF₃, Cl, Br, -CN, -NO₂, -CO₂ T¹, T¹, T⁵,-SO₂ T¹, -SO₂ T⁴, -OT¹, -OT², -OT⁴, -OCOT¹, -OCOT⁴, -OSO₂ T¹ or -OSO₂ T⁴,

R² and R⁴ independently of one another denote H, Cl, Br, -NO₂, -CF₃, T¹, -OT¹, -OT², -OT⁴, -OCOT¹, -OCOT⁴, OSO₂ T¹ or -OSO₂ T⁴,

R³ represents H, Cl, Br, -CN, -NO₂, -CF₃, -CO₂ T¹, T¹, T⁵, -OT¹, -OT², -OT⁴, -OCOT¹, -OCOT⁴, -SO₃ T¹ or -SO₂ T⁴,

T¹ represents C₁ -C₈ -alkyl, which is optionally substituted by -C₁ -C₈ -alkoxy, -C₁ -C₈ -alkoxy-C₂ -C₅ -alkoxy, -OCOT¹, -CO₂ T¹, Cl, Br, -CN or T⁴,

T² represents C₂ -C₈ -alkenyl, which is optionally substituted by -C₁ -C₈ -alkoxy, -C₁ -C₈ -alkoxy-C₂ -C₅ -alkoxy, -CN, -CO₂ T¹, Cl or Br,

T⁴ represents phenyl, which is optionally substituted by Cl, Br, T¹, OT¹, -CF₃, -NO₂, -CN or -CO₂ T¹,

T⁵ denotes oxazole, phenyloxazole, benzoxazole, thiazole, benzothiazole, thiadiazole or thiophene, which is optionally substituted by Cl, Br, T¹, -NO₂ and/or -CO₂ T¹ and

X denotes O.

Especially preferred disperse dyestuffs of the formula (I) are those wherein

A¹ represents H, T¹ or -CF₃,

A² denotes H, -CN or -CO₂ T¹,

A³ represents -CN or -CO₂ T¹,

A⁴ denotes A³, or

A³ and A⁴, together with the C atom to which they are bonded, form a cyclic methylene-active compound of the formula (IIa) or (IId), where the radicals of the cyclic methylene-active compound are shown in the form of ##STR12## A⁵ represents H, T¹ or T², D represents a radical of the formula ##STR13## wherein R¹ and R⁵ independently of one another denote H, Cl, Br, -CN, -NO₂, -CO₂ T¹, T¹, -OT¹ or -OT⁴,

R² and R⁴ independently of one another denote H, Cl, Br, -NO₂, T¹ or -OT¹,

R³ represents H, Cl, Br, -CN, -NO₂, T¹, -CO₂ T¹ or -OT¹,

T¹ represents C₁ -C₆ -alkyl or C₁ -C₄ -T⁴, optionally substituted by C₁ -C₆ -alkoxy, -C₁ -C₄ -alkoxy-C₂ -C₅ -alkoxy or -CO₂ T¹,

T² denotes C₂ -C₆ -alkenyl which is optionally substituted by Cl and/or Br,

T⁴ represents phenyl, which is optionally substituted by Cl, Br, -NO₂ and/or -CO₂ T¹ and

X denotes 0.

The disperse dyestuffs of the formula I according to the invention have a good fastness to light, high tinctorial strength and high affinity on polyester, and dye polyester in brilliant shades.

Cationic dyestuffs

Preferred cationic dyestuffs of the formula (I) are those wherein A¹ to A⁵ and X have the meanings given for the disperse dyestuffs of the formula (I) and

D represents a radical of the formula (IIIa) to (IIIu), preferably (IIIa),

wherein K.sup.⊕ is bonded to one or more positions, as desired, of the radicals D and/or A¹ to A⁵,

B.sup.⊖ denotes an anion,

l represents 1 or 2 and m is preferably 0.

Preferred anions B.sup.⊖ are colourless, organic and inorganic anions, for example fluoride, chloride, bromide, iodide, perchlorate, tetrafluoroborate, hydroxide, hydrogen sulphate, sulphate, dihydrogen phosphate, hydrogen phosphate, phosphate, bicarbonate, carbonate, methyl-sulphate, ethyl-sulphate, cyanate, thiocyanate, tri- and tetrachlorozincate, tetrachloroferrate, hexafluorosilicate and anions of saturated or unsaturated aliphatic, cycloaliphatic, aromatic or heterocyclic carboxylic and sulphonic acids, such as formate, acetate, hydroxyacetate, cyanoacetate, propionate, hydroxypropionate, oxalate, citrate, lactate, tartrate, the anion of cyclohexanecarboxylic acid, phenylacetate, benzoate, the anion of nicotinic acid, methanesulphonate, ethanesulphonate, benzenesulphonate, chlorobenzenesulphonate and toluenesulphonate. If the anions are polyvalent, for example sulphate or oxalate, B.sup.⊖ in formula (I) represents one equivalent of such a polyvalent anion.

Preferred cationic diazo components D are radicals D¹ of the formula ##STR14## wherein R¹, K.sup.⊕ and B.sup.⊖ have the abovementioned meaning and

W denotes a direct bond or a bridge member.

Possible bridge members W are, for example, the following radicals: ##STR15## wherein R₇ denotes hydrogen, methyl or ethyl and

m₁ and p₁ independently of one another represent any number from 1 to 4.

Suitable radicals K.sup.⊕ are, for example: ##STR16##

Acid dyestuffs

Preferred acid dyestuffs of the formula (I) are those wherein D, A¹ to A⁵ and X have the meanings given for the disperse dyestuffs of the formula (I), at least one SO₃ H group and/or one COOH group being bonded to at least one of these radicals. Particularly preferred acid dyestuffs of the formula (I) are those wherein m denotes 1 to 4.

Radicals D containing sulphonic acid groups are, for example, radicals D², wherein D² is a phenyl, phenylazophenyl or naphthyl radical which carries 1 or 2 SO₃ H, OSO₃ H or phenyl-SO₂ -NH-SO₂ groups and is optionally substituted one to four times by C₁ -C₄ -alkyl, C₁ -C₄ -alkoxy, trifluoromethyl, C₁ -C₄ -alkylcarbonylamino, benzoylamino, C₁ -C₄ -alkylsulphonylamino, benzenesulphonylamino, cyano, halogen, nitro, C₁ -C₄ -alkylsulphonyl, phenylsulphonyl, tolylsulphonyl, chlorophenylsulphonyl, carboxyl, C₁ -C₄ -alkoxycarbonyl, aminocarbonyl, aminosulphonyl, N-mono- or di-C₁ -C₄ -alkyl-substituted aminocarbonyl or -sulphonyl, or by one benzothiazolyl.

Suitable radicals D² correspond, in the form of their diazo components, for example, to the following:

1-Aminobenzene-2-, -3- or -4-sulphonic acid, 1-aminobenzene-2,4- or -2,5-disulphonic acid, 1-amino-2-methylbenzene-4-sulphonic acid, 1-amino-3-methylbenzene-4-sulphonic acid, 1-amino-4-methylbenzene-2- or -3-sulphonic acid, 2-nitroaniline-4-sulphonic acid, 4-nitroaniline-2-sulphonic acid, 2-chloroaniline-4- or -5-sulphonic acid, 3-chloroaniline-6-sulphonic acid, 4-chloroaniline-2-sulphonic acid, 1-amino-3,4-dichlorobenzene-6-sulphonic acid, 1-amino-2,5-dichlorobenzene-4-sulphonic acid, 1-amino-4-methyl-5-chlorobenzene-2-sulphonic acid, 1-amino-3-methyl-4-chlorobenzene-6-sulphonic acid, 2-amino-4-sulphobenzoic acid, 1-amino-4-acetaminobenzene-2-sulphonic acid, 1-amino-5-acetaminobenzene-2-sulphonic acid, 1-amino-2-methoxy-4-nitrobenzene-5-sulphonic acid, 1-aminonaphthalene-2- or 4-sulphonic acid, 2-aminonaphthalene-1-sulphonic acid and the diazo components of the formulae ##STR17##

Reactive dyestuffs

Preferred reactive dyestuffs of the formula (I) are those wherein D, A¹ to A⁵ and X have the meanings given for the disperse dyestuffs of the formula (I), an SO₃ H group and/or a COOH group preferably being bonded to at least one of these radicals, and wherein one or more identical or different fibre-reactive radicals Z are bonded to at least one of the radicals mentioned.

Reactive dyestuffs of the formula (I) where n=1 to 3 are preferred.

Preferred fibre-reactive radicals are, for example, those of the formula -CH═CH₂ or -CH₂ CH₂ -V, wherein

V=OH OSO₃ H, SSO₃ H, OCOCH₃, OPO₃ H₂, OSO₂ CH₃, SCN, NHSO₂ CH₃, Cl, Br, F, OCOC₆ H₅, OSO₂ -C₆ H₄, N(CH₃)₃ !.sup.⊕ anion.sup.⊖ or an optionally substituted pyridinium radical (substituents on the pyridinium C₁ -C₄ -alkyl, COOH, SO₃ H, CN or carboxamide) (anion=for example, Cl, HSO₄.sup.⊖, HCO₃ .sup.⊖ and the like),

or heterocyclic fibre-reactive radicals.

Suitable fibre-reactive radicals Z, i.e. those which react with the OH or NH groups of the fibre under dyeing conditions to form covalent bonds, are preferably those which contain at least one reactive substituent bonded to a 5- or 6-membered aromatic-heterocyclic ring, for example to a monoazine, diazine or triazine ring, in particular a pyridine, pyrimidine, pyridazine, pyrazine, thiazine, oxazine or asymmetric or symmetric triazine ring, or to such a ring system which contains one or more fused-on aromatic-carboxylic rings, for example a quinoline, phthalazine, cinnoline, quinazoline, quinoxaline, acridine, phenazine or phenanthridine ring system, and which are not bonded to a further chromophore.

Examples which may be mentioned of the reactive substituents on the heterocyclic radicals are halogen (Cl, Br or F), ammonium, including hydrazinium, pyridinium, picolinium, carboxypyridinium, sulphonium, sulphonyl, azido (N₃), thiocyanato, thiolether, oxy-ether, sulphinic acid and sulphonic acid.

The following radicals may be mentioned specifically as examples of Z: 2,4-Difluorotriazin-6-yl, 2,4-dichlorotriazin-6-yl and monohalogeno-sym.-triazinyl radicals, which are substituted by alkyl, aryl, amino, monoalkylamino, dialkylamino, aralkylamino, arylamino, morpholino, piperidino, pyrrolidino, piperazino, alkoxy, aryloxy, alkylthio or arylthio, where alkyl denotes optionally substituted C₁ -C₄ -alkyl, aralkyl denotes optionally substituted phenyl-C₁ -C₄ -alkyl and aryl denotes optionally substituted phenyl or naphthyl, and the substituents for alkyl are halogen, hydroxyl, cyano, dialkylamino, morpholino, C₁ -C₄ -alkoxy, carboxyl, sulpho or sulphato, and the substituents for phenyl and naphthyl are sulpho, C₁ -C₄ -alkyl, C₁ -C₄ -alkoxy, carboxyl, halogen, acylamino, hydroxyl and amino. Further radicals to be mentioned are 2-amino-4-fluorotriazin-6-yl, 2-methylamino-4-fluorotriazin-6-yl, 2-ethylamino-4-fluorotriazin-6-yl, 2-isopropylamino-4-fluoro-triazin-6-yl, 2-dimethylamino-4-fluorotriazin-6-yl, 2-diethylamino-4-fluorotriazin-6-yl, 2-β-methoxy-ethylamino-4-fluoro-triazin-6-yl, 2-β-hydroxyethylamino-4-fluoro-triazin-6-yl, 2-di-(β-hydroxyethylamino)-4-fluorotriazin-6-yl, 2-carboxymethylamino-4-fluoro-triazin-6-yl, 2-di-(carboxymethylamino)-4-fluoro-triazin-6-yl, 2-sulphomethyl-methylamino-4-fluoro-triazin-6-yl, 2-β-cyanoethylamino-4-fluoro-triazin-6-yl, 2-benzylamino-4-fluoro-triazin-6yl, 2-β-phenyl ethylamino-4-fluoro-triazin-6-yl, 2-benzyl-methylamino-4-fluoro-triazin-6-yl, 2-(4'-sulphobenzyl)-amino4-fluoro-triazin-6-yl, 2-cyclohexylamino-4-fluoro-triazin-6-yl, 2-(o-, m- or p-methylphenyl)-amino4-fluoro-triazin-6-yl, 2-(o-, m- or p- sulphophenyl)-amino-4-fluoro-triazin-6-yl, 2-(2',5'-disulphophenyl)-amino4-fluorotriazin-6-yl, 2-(o-, m- or p-chlorophenyl)-amino-4-fluoro-triazin-6-yl, 2-(o-, m- or p-methoxyphenyl)-amino-4-fluoro-triazin-6-yl, 2-(2'-methyl-4'-sulphophenyl)-amino4-fluoro-triazin-6-yl, 2-(2'-methyl-5'-sulphophenyl)-amino4-fluoro-triazin-6-yl, 2-(2'-chloro-4'-sulphophenyl)-amino-4-fluoro-triazin-6-yl, 2-(2'-chloro-5'-sulphophenyl)-amino-4-fluoro-triazin-6-yl, 2-(2'-methoxy-4'-sulphophenyl)-amino-4-fluoro-triazin-6-yl, 2-(o-, m- or p-carboxyphenyl)-amino-4-fluoro-triazin-6-yl, 2-(2',4'-disulphophenyl)-amino-4-fluoro-triazin-6-yl, 2-(3',5'-disulphophenyl)-amino-4-fluoro-triazin-6-yl, 2-(2'-carboxy4'-sulphophenyl)-amino4-fluoro-triazin-6-yl, 2-(2'-carboxy-5'-sulphophenyl)-amino4-fluoro-triazin-6-yl, 2-(6'-sulpho-naphth-2'-yl)-amino-4-fluoro-triazin-6-yl, 2-(4',8'-disulphonaphth-2'-yl)-amino-4-fluoro-triazin-6-yl, 2-(6',8'-disulphonaphth-2'-yl)-amino-4-fluoro-triazin-6-yl, 2-(N-methyl-N-phenyl)-amino-4-fluoro-triazin-6-yl, 2-(N-ethyl-N-phenyl)-amino-4-fluoro-triazin-6-yl, 2-(N-β-hydroxyethyl-N-phenyl)-amino4-fluoro-triazin-6-yl, 2-(N-isopropyl-N-phenyl)-amino-4-fluoro-triazin-6-yl, 2-morpho- lino-4-fluoro-triazin-6-yl, 2-piperidino-4-fluoro-triazin-6-yl, 2-(4',6',8'-trisulphonaphth-2'-yl)-amino-4-fluorotriazin-6-yl, 2-(3',6',8'-trisulphonaphth-2'-yl)-amino-4-fluoro-triazin-6-yl, 2-(3', 6'-disulphonaphth- 1'-yl)-amino-4-fluoro-triazin-6-yl, N-methyl-N-(2,4-dichlorotriazin-6-yl)-carbamyl, N-methyl-N-(2-methylamino-4-chlorotriazin-6-yl)-carbamyl, N-methyl-N-(2-dimethylamino-4-chlorotriazin-6-yl)-carbamyl, N-methyl- or N-ethyl-N-(2,4-dichlorotriazin-6-yl)-aminoacetyl, 2-methoxy-4-fluoro-triazin-6-yl, 2-ethoxy-4-fluoro-triazin-6-yl, 2-phenoxy-4-fluoro-triazin-6-yl, 2-(o-, m- or p-sulphophenoxy)-4-fluoro-triazin-6-yl, 2-(o-, m- or p-methyl- or -methoxy-phenoxy)-4-fluoro-triazin-6-yl, 2-β-hydroxyethylmercapto-4-fluoro-triazin-6-yl, 2-phenylmercapto-4-fluoro-triazin-6-yl, 2-(4'-methylphenyl)-mercapto-4-fluorotriazin-6-yl, 2-(2',4'-dinitrophenyl)-mercapto-4-fluoro-triazin-6-yl, 2-methyl-4-fluoro-triazin-6-yl, 2-phenyl-4-fluoro-triazin-6-yl and the corresponding 4-chloro- and 4-bromotriazinyl radicals and the corresponding radicals obtainable by exchange of halogen with tertiary base, trimethylamine, triethylamine, dimethyl-β-hydroxyethylamine, triethanolamine, N,N-dimethylhydrazine, pyridine, α, β- or γ-picoline, nicotinic acid or isonicotinic acid, sulphinates, in particular benzenesulphonic acid, or hydrogen sulphite, and di- or trihalogenopyrimidinyl radicals, such as 2,4-dichloropyrimidin-6-yl, 2,4,5-trichloro-pyrimidin-6-yl, 4,5-dichloropyrimidin-6-yl, 2,4-difluoropyrimidin-6-yl, 4,5-difluoropyrimidin-6-yl, 4-fluoro-5-chloropyrimidin-6-yl, 2,4-difluoro-5-chloropyrimidin-yl and 2,3-dichloroquinoxaline-5-carbonyl and 2,3-dichloroquinoxaline-6-carbonyl.

Suitable diazo components for the reactive dyestuffs of the formula (I) are, inter alia, those wherein D has the abovementioned meaning, and represents D² with the meaning given there, and furthermore represents reactive diazo components D³, wherein D³ denotes ##STR18## wherein R⁸ can assume the meanings given for R¹ and additionally can denote SO₃ H, OSO₃ H or COOH and

R⁹ represents H, T¹ or T⁴.

The dyestuffs according to the invention, in particular disperse dyestuffs of the formula (I), can be prepared by coupling diazotized amines which, as the amine, correspond to the formula (IV)

    D-NH.sub.2                                                 (IV)

to coupling components of the ##STR19## wherein A¹ to A⁵, D and X have the abovementioned meaning and E represents a substituent which can be replaced by electrophilic substitution, such as, for example, H, -CO₂ H, -CH₂ OH, -SO₃ H, -CH═O, -COT, ##STR20##

Such a coupling process with displacement of a substituent is described, for example, in GB 2 036 775 and Jp 58 157 863.

The coupling can be carried out in an aqueous and non-aqueous solvent. Non-aqueous solvents which may be mentioned are alcohols, such as methanol, ethanol, propanol, butanol, pentanol and the like, dipolar aprotic solvents, such as DMF, DMSO and NMP, and water-immiscible solvents, such as toluene and chlorobenzene.

The coupling is preferably carried out in the stoichiometric ratio, but it may be advantageous and in some cases appropriate for economic reasons to employ the cheaper components in an excess of up to 30%.

The coupling is carried out at temperatures between -30 and 100° C., temperatures from -10 to 30° C. being preferred and temperatures from -5 to 10° C. being particularly preferred.

The coupling can be carried out in an acid medium and also in an alkaline medium. pH values >0.5 and <14 are preferred, particularly preferably >1.0 and <12 and especially preferably >3.0 and ≦11.0.

An oxidative coupling of (hetero)aromatic hydrazines of the formula (VI)

    D-NH-NH.sub.2                                              (VI)

to coupling components of the formula (V) is furthermore also possible, which is characterized in that VI is coupled oxidatively in the presence of V. Methods of oxidative coupling are described, for example, in Houben-Weyl "Methoden der organischen Chemie Methods of organic chemistry!", Volume 10/3, page 360 et seq., and also in EP 201 892 or Chem. Express 1988, 3(7), 423-6.

A process for the preparation of dyestuffs of the formula (I) wherein X denotes O is furthermore preferred, which is characterized in that compounds of the formula (VII), which can exist in the tautomeric forms of the formula (VIIa) and (VIIb) ##STR21## wherein G¹ denotes O, NH or NT, preferably O,

G² represents -OT, -NH₂ or -NHT, preferably OT¹, and

D and A¹ have the abovementioned meanings,

are subjected to a condensation reaction with enamines of the formula (VIII) ##STR22## wherein A² to A⁵ have the abovementioned meanings.

This condensation reaction is preferably carried out, in the case of the disperse dyestuffs of the formula (I), in organic solvents, in particular dipolar aprotic solvents. Examples which may be mentioned are alcohols, such as methanol and ethanol, and, on the other hand, DMF, DMSO and NMP.

The condensation reaction is carried out at temperatures from -10 to 200° C., preferably from 0 to 150° C., in particular at 20 to 130° C.

The condensation reaction is preferably carried out in the presence of bases, such as, for example, secondary and tertiary amines and alkali metal alcoholates. The amount of base varies here between catalytic and five times the molar amounts. 1 to 3 mol of base are preferably employed. Suitable bases are, for example, triethylamine, sodium methylate, sodium ethylate, sodium butylate, sodium amylate, K₂ CO₃, Na₂ CO₃, DBU (diazabicycloundecene) and DBN (diazabicyclononene).

The compounds of the formula (VII) are known in some cases from DE-A-2 015 172, or they can be prepared by known methods.

The enamines of the formula (VIII) are known in most cases and/or are accessible by "dimerization" or "codimerization" of cyanoacetic acid derivatives in accordance with the equation ##STR23## cf., for example, Liebigs Ann. Chem. 1987, 1131 to 1132 and literature cited therein.

Preferred enamines of the formula (VIII) correspond to the formulae (VIIIa) to (VIIIc). ##STR24##

Another method of preparation of enamines of the formula (VIII) is the reaction of iminoesters with methylene-active compounds in accordance with Liebigs Ann. Chem. 1986, 533 to 544 ##STR25## wherein T¹ has the abovementioned meaning.

Compounds of the formula (V) are known in some cases from AU 491 554, Aust. J. Chem. 29 (1976), 1039-50 and J. Am. Chem. Soc. 81, 2452.

The invention furthermore relates to compounds of the formula (V) ##STR26## wherein E and X have the abovementioned broadest meanings,

A¹ and A² independently of one another denote H or a radical of the formula T, -COH, -CO-T, -CO₂ T, -CN, -CONH₂, -CONHT, -CONT₂, CF₃, -NO₂, NO, -SO₂ T, -OH, -OT, -OCOT, -OCO₂ T, -OSO₂ T, Cl, Br or I,

wherein

T can assume the meaning of T¹, T², T³, T⁴ or T⁵, where

T¹ =alkyl, cycloalkyl or aralkyl,

T² =alkenyl,

T³ =alkinyl,

T⁴ =aryl,

T⁵ =hetaryl,

A³ and A⁴ independently of one another denote an electron-withdrawing radical, or together with the common C atom form a cyclic methylene-active compound,

A⁵ represents H or a radical of the formula T, -OT¹, -NH₂, -NHT, -NT₂, -NHCOH, -NHCOT, -N═CH-T, -N═CT₂ or NHSO₂ T, or

A¹ and A² or

A² and A³, together with the particular atoms in between, form an unsaturated, optionally substituted 5- or 6-membered carbo- or heterocyclic radical, where, in the case of ring formation with participation of one of the radicals A³ or A⁴, the other particular radical denotes an electron-withdrawing radical, and where the radicals A¹ to A⁵ optionally carry one or more SO₃ H, COOH or K.sup.⊕ and B.sup.⊖ groups, wherein K.sup.⊕ and B.sup.⊖ have the above meanings.

Preferred compounds of the formula (V) are those wherein

A¹ denotes H, T¹, T⁴ or CF₃,

A² denotes H, -CO₂ T¹, -CN, -CONH₂, -CONHT, -CO₂ T² or -CONT¹ ₂,

A³ denotes -CO₂ T¹, -CN, -CONH₂, -CONHT, -CONT¹ ₂ or -CO₂ T²,

A⁴ denotes -CO₂ T¹, -CN, -CONH₂, -CONHT, -CONT¹ ₂ or -CO₂ T²,

A⁵ denotes H, T¹ or T² or

A³ and A⁴, together with the common C atom, denote a cyclic methylene-active compound of the formula (IIa) or (IId) and

E denotes H.

Particularly preferred compounds of the formula (V) are those wherein

A¹ denotes H, CH₃, C₆ H₅ or CF₃,

A² denotes H, CO₂ C₁ -C₁₀ -alkyl, -CO₂ C₂ -C₁₀ -alkenyl,

A³ and A⁴ independently of one another denote -CO₂ C₁ -C₁₀ -alkyl, -CO₂ C₂ -C₁₀ -alkenyl or -CN,

A⁵ denotes H or C₁ -C₁₀ -alkyl and

E denotes H.

The invention furthermore relates to a process for the preparation of the compounds of the formula (V) in the form of the compound Va or Vb, wherein X represents O or NH, characterized in that acetic acid derivatives of the formula IXa or IXb are reacted with enamines of the formula (VIII): ##STR27## wherein A¹ to A⁵, E, G¹ and X have the abovementioned broadest meaning,

wherein

A⁵ preferably represents H, and

G² has the abovementioned meaning.

Preferably,

G¹ represents O,

E represents H and

G² represents OT¹.

The reaction is preferably carried out in organic solvents. Suitable solvents are alcohols, dipolar aprotic solvents, such as DMF, water-immiscible solvents and esters, above all acylacetic esters, such as, for example, methyl or ethylacetoacetate.

Water-immiscible solvents offer the advantage that the water formed in the reaction in the case where G¹ =O can be removed azeotropically with them from the reaction mixture.

A particularly preferred embodiment, especially in the case of less reactive enamines of the formula (VIII), i.e. wherein A² represents -CO₂ T, comprises working with an excess of (IX) as the solvent--without using further cosolvents. This excess of (IX) over (VIII) is preferably 5 to 500% by weight.

The reaction is preferably carried out at temperatures from 0 to 200° C., preferably 20 to 150° C., particularly preferably at 70 to 120° C.

The reaction can be accelerated by catalysts. Suitable catalysts are acids, such as, for example, glacial acetic acid, and acid-base pairs, such as β-alanine-glacial acetic acid, ammonium acetate, piperidine-glacial acetic acid and morpholine-glacial acetic acid.

Inorganic and organic bases are furthermore suitable as catalysts or reaction partners. Bases which may be mentioned are sodium hydroxide, sodium ethylate, potassium ethylate, triethylamine, piperidine, morpholine and ethanolamine, such as are also employed in condensation reactions of CH-acid compounds with acetylacetone and the like. (Compare: Monatshefte fur Chemie 95 1201, 1473 (1964) and J. Chem. Eng. Data 29, 101).

Particularly suitable bases, especially with less reactive enamines of the formula (VIII), wherein A² represents -CO₂ T, are sterically hindered strong bases, such as, for example, potassium tert-butylate, and sterically hindered N bases, such as, for example, diazabicycloundecene (DBU) and diazabicyclononene (DBN).

The reaction can be carried out under normal pressure and also under increased or reduced pressure. It is preferable, especially in the case of less reactive enamines of the formula (VIII), to work under reduced pressure under pressures of <200 mbar, in particular <100 mbar, so that the cleavage products water and alcohol formed from the condensation reaction with the preferred acetic acid derivative of the formula (IX), the alkylacetoacetate, can be removed rapidly from the reaction mixture.

In contrast to the acid catalysts and acid-base pairs, bases are preferably employed in the stoichiometric ratio or in an excess. The excess can be 1 to 500%.

A process which is also preferred is a process for the preparation of compounds of the formula V which correspond to the formula X which is characterized in that a trifluoroacetic ester of the formula (XI), which represents a particular embodiment of the acetic acid derivative of the formula (IX), is subjected to a condensation reaction with dimeric cyanoacetic acid esters of the formula (XII), which represent a particular embodiment of the enamines of the formula (VIII) ##STR28## wherein T¹ has the abovementioned broadest meaning. The reaction conditions are the same as those described above for less reactive enamines.

The invention also relates to a process for the preparation of compounds of the formula (V), wherein A⁵ represents T¹, T² or T³, which is characterized in that pyridinium salts of the formula (XIII) ##STR29## wherein E, A¹ and A² have the abovementioned broadest meaning,

An.sup.⊖ is an anion, which can assume, for example, the meanings given for B.sup.⊖, and in particular represents Cl.sup.⊖, Br.sup.⊖, I.sup.⊖, T¹ OSO₃.sup.⊖ or TSO₃.sup.⊖,

A⁵ represents T¹, T² or T³ and

Y¹ and Y² independently of one another represent a leaving group, such as F, Cl, Br, I, -OSO₂ T, -OT, -ST or -SO₂ T,

are reacted with compounds of the formula (II) ##STR30## wherein A³ and A⁴ have the abovementioned broadest meaning,

to give compounds of the formula (XIV) ##STR31## and these are reacted with compounds of the formula (XV)

    XH.sub.2                                                   (XV)

wherein

X represents O, NH, NT¹, NCOT, NCO₂ T or NSO₂ T,

to give compounds of the formula (V)

wherein A⁵ represents T¹, T² or T³.

In a preferred embodiment of this process,

E represents H,

A¹ represents H or T¹,

A² represents H,

Y¹ represents Cl, Br or I,

Y² represents Cl, Br, I or -OT¹ and

H₂ X represents H₂ O, NH₃, H₂ NT¹ or H₂ NSO₂ T, in particular H₂ O.

In a particular embodiment of the process, A⁵ represents T¹ or T², particularly preferably T¹, and especially preferably methyl or ethyl.

The reaction of the compounds of the formulae (XIII) and (II) can be carried out in water or in aqueous or non-aqueous solvents, such as, for example, alcohols or dipolar aprotic solvents.

Suitable temperatures are -20 to 150° C., preferably 0 to 100° C., in particular 15 to 80° C.

This reaction is preferably carried out in the presence of inorganic or organic bases. Suitable bases are alkali metal hydroxides, alkali metal alcoholates, alkali metal hydrides, alkali metal oxides, alkaline earth metal oxides, alkali metal carbonates, alkali metal bicarbonates, alkali metal hydrides or organic N bases, such as tertiary amine (triethylamine, DBU, DBN and the like). These bases are preferably employed in stoichiometric amounts, i.e. twice the molar amounts in (XIII).

Instead of the compound (II), the corresponding anion of (II) ##STR32## wherein A³ and A⁴ have the abovementioned broadest meaning and Cat.sup.⊕ represents a cation, such as, for example, those of lithium, sodium and potassium, can also be employed for the reaction with pyridinium salts (XIII).

The second reaction stage--conversion of (XIV) into (V)--is also preferably carried out in the presence of bases.

In the case where the compounds of the formula (XV) correspond to the amines -NH₃ or H₂ NT¹, these reactants are also preferably employed simultaneously as the base and, where appropriate, also as the solvent.

If X represents O, alkali metal hydroxides, alkaline earth metal hydroxides and/or alkali metal carbonates are preferably employed as bases.

If X represents -NCOT, -NCO₂ T or -NSO₂ T, the corresponding anion, for example C₆ H₅ SO₂ NH.sup.⊖, is preferably employed as the base and reactant.

Further preferred bases here are also inert bases and sterically hindered bases. Suitable bases are, for example, tertiary amines, such as triethylamine, DBU and DBN. Preferably, at least 2 molar equivalents of base are employed.

Suitable solvents are preferably organic solvents which are inert under these conditions, such as, for example, dipolar aprotic solvents, aromatic hydrocarbons, such as toluene, and chlorinated hydrocarbons, such as chlorobenzene.

Depending on the nucleophilicity of the educt H₂ X or of the corresponding base, the reaction takes place at temperatures between -20° C. and 200° C., preferably 0° C. and 150° C.

The pyridinium salts of the formula (XIII)* required are accessible in a simple manner by quaternization of corresponding pyridines (XVI) with alkylating agents A⁵ -An, such as, for example, dimethyl sulphate, in accordance with the reaction ##STR33##

For ecological and economic reasons, the quaternization and also the reaction with compounds (II) and, where appropriate, also the reaction with XH₂ are preferably carried out without intermediate isolation.

Another process for the preparation of the coupling components of the formula (V), wherein A⁵ represents T, is characterized in that pyridine derivatives of the formula (XVII) are reacted with compounds of the formula (II): ##STR34## wherein X=O, A¹ to A⁴ and E have the abovementioned meaning and A⁵ represents T.

In a preferred embodiment of this process, E represents H,

A¹ represents H or T¹, especially preferably H,

A² represents H,

Y¹ represents F, Cl, Br, I, OSO₂ T, SO₂ T, -ST or OT, particularly preferably Cl, Br or -SO₂ T, and especially preferably Cl, and

A⁵ represents T¹ or T², particularly preferably T¹, and especially preferably methyl or ethyl, and

one of the two radicals A³ and A⁴ preferably represent -CN, -CO₂ T, -CONH₂, -CONHT, -CONT², -CHO, -COT, -SO₂ T, -SO₂ NH₂, -SO₂ NHT, -SO₂ NT₂, -NO₂, T⁴ or T⁵,

while the other preferably represents -CN, -CO₂ T, -CONH₂, -CONHT or -CONT², or

A³ and A⁴, together with the C atom to which they are bonded, form a cyclic methylene-active compound of the formulae (IIa to IIv), preferably (IIa to IIh), in particular (IIa and IId).

Suitable solvents for this reaction are preferably organic solvents. Both water-miscible and water-immiscible solvents are possible here.

The reaction temperatures are preferably in the range from 20 to 250° C., preferably 50 to 150° C.

Bases are preferably added, in particular more than 2 molar equivalents of base, based on the starting material of the formula (XVII).

Suitable bases are inorganic or organic in nature. For example, tertiary amines, such as triethylamine, DBU and DBN, are suitable.

Another process for the preparation of coupling components of the formula (V), which correspond to the formula (XX), wherein A⁵ represents T¹, T² or T³, is characterized in that 2-methylpyridones of the formula (XVIII) are reacted with phthalic acid esters of the formula (XIX) in the presence of bases ##STR35## wherein A¹, A², E, T¹ and V¹ have the abovementioned broadest meaning.

In a preferred embodiment of this process

E represents H,

A⁵ represents T¹, particularly preferably methyl or ethyl,

A¹ represents H, T¹ or T⁴, particularly preferably T¹, and especially preferably methyl, and

V¹ represents H.

In this reaction, the phthalic acid ester of the formula (XIX) simultaneously serves as the solvent.

Suitable bases are preferably alkali metal alcoholates, which are preferably employed in at least equimolar amounts, based on (XVIII).

The reaction temperature is in general 50 to 200° C., preferably 100 to 160° C., the alcohol T¹ OH formed preferably being distilled off from the reaction.

The removal of the alcohol can be promoted by working under reduced pressure.

The product can be isolated in crystalline form by discharging the mixture onto water and acidifying the aqueous phase.

The dyestuffs of the formula (I) according to the invention are suitable, depending on the presence of substrate-specific substituents, for dyeing and printing naturally occurring and synthetic materials, such as, for example, cellulose fibres, cotton, wool, silk, polyamide, polyacrylonitrile, polyester or polyolefins.

Thus, for example, the dyestuffs described as disperse dyestuffs of the formula (I) are particularly suitable, either as such or also as a mixture with other disperse dyestuffs, for dyeing and printing hydrophobic synthetic fibre materials and mixtures thereof with naturally occurring fibre materials.

Possible hydrophobic synthetic materials are, for example: cellulose 21/2-acetate, cellulose triacetate, polyamides and, in particular, polyesters, such as, for example, polyethylene glycol terephthalate. Mixtures thereof with naturally occurring fibre materials are, for example, cotton, regenerated cellulose fibres or wool.

They are furthermore suitable for dyeing and, where appropriate, printing waxes, oils and plastics such as polymethacrylate, PVC, polystyrene or ABS.

They are also suitable for textile and non-textile thermotransfer printing, for example by means of a thermal head or also by means of ink-jet processes.

The compounds described as cationic dyestuffs of the formula (I) in the context of this Application are preferably used for dyeing or printing acid-modified polyester or polyamide, but preferably for dyeing and printing polyacrylonitrile.

Moreover, they can also be employed for dyeing paper.

The compounds described as reactive dyestuffs of the formula (I) in the context of this Application are preferably used for dyeing and printing materials containing hydroxyl groups, such as, for example, cellulose fibres, in particular cotton, and for dyeing and printing materials containing amide groups, such as, for example, wool, silk and polyamide.

The compounds described as acid dyestuffs of the formula (I) in the context of this Application are preferably employed for dyeing and printing naturally occurring or synthetic polyamide and base-modified polyacrylonitrile fibres. They can moreover be employed for dyeing paper.

The dyestuffs can be applied here from aqueous or non-aqueous liquors or also in printing processes.

They produce strong dyeings with good general fastnesses.

Neutral dyestuffs produce particularly brilliant dyeings of high fastness to light on polyester. The shades range here from yellow to blue, the particular strength lying in brilliant red shades.

If A³ and A⁴ in the formulae mentioned in the Examples have different meanings, the configuration on the carbon atom to which they are bonded is not intended to be specified by the formulae. The enamines 3-amino-2-cyano-pentene-dioic acid diesters (Δ2-amino-1-cyanoglutaconic acid diesters) used in the Examples were prepared by processes analogous to that described in Liebigs Anm. Chem. 1987, 1131, in which such enamines are described as having the Z configuration.

EXAMPLES Example 1 Preparation of the dyestuff of the formula ##STR36##

5.5 ml of 40% strength nitrosylsulphuric acid were added to 6.1 g of 4-methyl-2-nitroaniline, dissolved in 20 ml of propionic acid and 40 ml of glacial acetic acid, at 0-5° C. in the course of 10 minutes. The mixture was stirred at 0-5° C. for a further 2 hours. 20 ml of 10% strength aqueous amidosulphonic acid solution and then, at 5° C., the above diazotization reaction mixture were added to a solution, brought to pH 7 by means of a few ml of concentrated sodium hydroxide solution, of 5.8 g of 6-hydroxy-3-cyano-4-methyl-2(1H)-pyridinylidene!-malononitrile in 400 ml of water. The mixture was allowed to warm to room temperature in the course of 16 hours, the precipitate was filtered off with suction and the filter cake was washed neutral with water.

Yield: 9.3 g

MS, m/z (%): 361 (72) M⁺. !, 315 (18) M⁺. --NO₂ ! 152 (100)

UV (DMF): λ_(max) =537 nm

The dyestuff dyes polyester in a bluish-tinged red with good fastness properties.

The dyestuffs of the formula ##STR37## listed below, which likewise dye polyester with good properties, were obtained analogously to Example 1.

                                      TABLE 1     __________________________________________________________________________     Ex.                          Colour shade on     No.        D                    λ.sub.max nm                                  polyester     __________________________________________________________________________        1 #STR38##           535 (CH.sub.3 CN)                                  Ruby     3        2 #STR39##           535 (CH.sub.3 CN)                                  Ruby     4        3 #STR40##                Yellowish-tinged red     5        4 #STR41##                Yellowish-tinged red     6        5 #STR42##                Yellowish-tinged red     7        6 #STR43##           536 (CH.sub.3 CN)                                  bluish-tinged pink     8        7 #STR44##                Bluish-tinged red     9        8 #STR45##                Bluish-tinged red     10        9 #STR46##           518 546 sh (CH.sub.3 CN)                                  Ruby     11        0 #STR47##                Bluish-tinged red     12        1 #STR48##                Bluish-tinged scarlet     13        2 #STR49##                Bluish-tinged red     14        3 #STR50##                Scarlet     15        4 #STR51##                Yellowish-tinged red     16        5 #STR52##                Yellowish-tinged red     17        6 #STR53##                Violet     18        7 #STR54##           494 516 sh (CH.sub.3 CN)                                  Yellowish-tinged red     19        8 #STR55##           518 546 sh (CH.sub.3 CN)                                  Bluish-tinged red     20        9 #STR56##                Red-violet     21        0 #STR57##                Reddish-tinged violet     22        1 #STR58##           507 (CH.sub.3 CN)                                  Bluish-tinged red     23        2 #STR59##           518 546 sh (CH.sub.3 CN)                                  Bluish-tinged red     24        3 #STR60##           518 546 sh (CH.sub.3 CN)                                  Bluish-tinged red     25        4 #STR61##                Red-violet     26        5 #STR62##           507 531 sh (CH.sub.3 CN)                                  Bluish-tinged red     27        6 #STR63##                Red-violet     28        7 #STR64##           535 (CH.sub.3 CN)                                  Ruby     29        8 #STR65##                Bluish-tinged red     30        9 #STR66##                Bluish-tinged red     __________________________________________________________________________

Example 31 Preparation of 6-hydroxy-3-cyano4-methyl-2-(1H)-pyridinylidene!malononitrile ##STR67##

15.4 g of the sodium salt of 2-amino-1,2,3-tricyano-propene ("malononitrile dimer") were heated at the boil under reflux with 13 g of ethyl acetoacetate, 1 ml of piperidine and 6 g of glacial acetic acid in 100 ml of ethanol for 16 hours. After cooling, a beige powder was filtered off with suction and washed with ethanol.

Yield: 14.5 g

IR v (cm⁻¹): 3430, 2185 (C≡N), 2205(C≡N), 2225(C≡N) 1668, 1566, 1356, 832

¹ H-NMR (d₆ -DMSO, 300 MHz, ppm): δ=2.15 (s, 3H, CH₃), 5.70 (s, 1H), 7.30 (s, 2H, OH, NH)

MS, m/z (%): 198 (42 M⁺. !, 170 (13) M⁺. --H₂ O! 155 (100)

Example 32 Preparation of the dyestuff of the formula ##STR68##

8.3 ml of 40% strength nitrosylsulphuric acid were added to 6.6 g of methyl 2-aminobenzoate, dissolved in 15 ml of propionic acid and 30 ml of glacial acetic acid, at 0-5° C. in the course of 10 minutes. The mixture was stirred at 0° C. for a further 2 hours.

70 ml of the solution, described in the following Example No. 33, of the coupling component ethyl 6-hydroxy4-methyl-3-(ethoxycarbonyl)-2(1H)-pyridinylidene!-cyanoacetate (about 0.5 mol) in 550 ml of dimethylformamide were topped up to 200 ml with ethanol, 2 g of amidosulphonic acid were added and coupling was then carried out with the above diazotization mixture at 0° C., with the addition of 50 g of ice. The mixture was subsequently stirred for 15 hours and the product was filtered off with suction and washed with water.

Yield: 15.3 g. After recrystallization from dimethylformamide, 6.3 g remained.

The dyestuff dyed polyester in a brilliant orange with good fastness properties.

MS, m/z (%): 454 (100) M⁺. !, 422 (8) 409 (8), 350 (25), 349 (16), 322 (25) 293 (18)

λ_(max) : 483 nm (CH₃ CN)

Example 33 Preparation of coupling component of the formula ##STR69##

A solution of 113 g of diethyl 3-amino-2-cyano-pentenedioate ("dimeric ethyl cyanoacetate", 0.5 mol), 90 ml of ethyl acetoacetate and 76 g of diazabicycloundecene (DBU) in 500 ml of dimethylformamide was stirred at 120° C. for 11 hours. A further 25 ml of ethyl acetoacetate were added and the mixture was stirred at 120° C. for a further 9 hours, the readily volatile cleavage products being distilled off. The mixture was topped up to a volume of 800 ml with 50 ml of dimethylformamide and the brown solution was employed directly for the coupling reaction. A sample was freed from the solvent under 20 mbar/100° C. The brown oil which remained showed the following mass spectrum:

MS, m/z (%): 292 (27) M⁺. !, 247 (14), 218 (27), 192 (42), 174 (58), 164 (35), 152 (65), 151 (51), 148 (43), 96 (33), 42 (64), 29 (100)

The dyestuffs of the formula ##STR70## listed below (Table 2), which likewise dye polyester with good fastness properties, were obtained analogously to Example 32.

                                      TABLE 2     __________________________________________________________________________     Ex.                           Colour shade on     No. D                   λ.sub.max nm                                   polyester     __________________________________________________________________________     34         0 #STR71##          507 (DMF)                                   Bluish-tinged red     35         1 #STR72##          515 (CH.sub.3 CN)                                   Bluish-tinged red     36         2 #STR73##                Scarlet     37         3 #STR74##          495 (CH.sub.3 CN)                                   Scarlet     38         4 #STR75##                Orange     39         5 #STR76##          483 (CH.sub.3 CN)                                   Orange     40         6 #STR77##                Orange     41         7 #STR78##                Orange     42         8 #STR79##          507 (CH.sub.3 CN)                                   Pink     43         9 #STR80##          507 (CH.sub.3 CN)                                   Bluish-tinged red     44         0 #STR81##                Scarlet     45         1 #STR82##                Red     __________________________________________________________________________

Example 46 Preparation of the dyestuff mixture of the formula ##STR83##

11.7 g of ethyl 2-phenylazo-acetoacetate and 11 g of the sodium salt of dimethyl 3-amino-2-cyano-pentenedioate ("dimeric methylcyanoacetate") were stirred in 50 ml of dimethylformamide at 90° C. for 10 hours. After addition of a further 2.2 g of dimeric methylcyanoacetate, the mixture was heated at 100° C. for a further 6 hours. After cooling to room temperature, 100 ml of methanol, 6 g of 30% strength hydrochloric acid and 15 ml of water were added. The product was filtered off with suction and washed with methanol.

Yield: 4.1 g

The dyestuff dyed polyester in a brilliant scarlet with good fastness properties.

MS, m/z (%) 382 (22) M⁺. ethyl ester! 369 (20), 368 (89) M⁺. methyl ester!, 337 (9) M⁺. methyl ester - OCH₃ !, 310 (9), 276 (7), 231 (19), 199 (11), 105 (19) 93 (30), 92 (28), 77 (100)

λ_(max) : 486 nm (CH₃ CN)

The following dyestuffs of the formula ##STR84## which likewise dye polyester with good fastness properties, were obtained analogously to Example 46.

                                      TABLE 3     __________________________________________________________________________                                   Colour shade on     Ex. No.         D                    λ.sub.max nm                                   polyester     __________________________________________________________________________     47         2 #STR85##                Ruby     48         3 #STR86##                Bluish-tinged red     49         4 #STR87##           512 (CH.sub.3 CN)                                   Red     50         5 #STR88##           498 (CH.sub.3 CN)                                   Scarlet     51         6 #STR89##           485 (CH.sub.3 CN)                                   Orange     52         7 #STR90##                Orange     53         8 #STR91##           512 (CH.sub.3 CN)                                   Red     54         9 #STR92##                Bluish-tinged red     55         0 #STR93##           515 (CH.sub.3 CN)                                   Bluish-tinged red     56         1 #STR94##           516 (CH.sub.3 CN)                                   Bluish-tinged red     57         2 #STR95##           483 (CH.sub.3 CN)                                   Orange     58         3 #STR96##           483 (CH.sub.3 CN)                                   Orange     59         4 #STR97##           483 (CH.sub.3 CN)                                   Orange     __________________________________________________________________________

Example 60 Preparation of the coupling component of the formula ##STR98##

Diamyl 3-amino2-cyano-pentenedioate ("dimeric amylcyanoacetate") was prepared analogously to Junek, Monatschefte fur Chemie, 101 1979! 1208.

12.2 ml of diazabicyclononene (DBN) and 34.4 g of amyl acetoacetate were added to 31 g of diamyl 3-amino2-cyano-pentenedioate and the mixture was heated at 80° C. for 4 hours A further 8.6 g of amylacetoacetate were added and the mixture was heated at 80° C. for a further 2 hours. A brown oil was obtained which, when taken up in 200 ml of N-methylpyrrolidone, gave a weight of 276 g and was employed directly for the coupling reaction was obtained. A sample which was concentrated under 0.5 mbar/100° C. gave the following mass spectrum

    ______________________________________     MS, m/z (%)               376 (12)  M.sup.+ !, 262 (8), 236 (11), 219 (18), 218 (21),               193 (11), 192 (45), 151 (30), 55 (35), 43 (100)     ______________________________________

The dyestuffs listed below, which likewise dyed polyester with good fastness properties, were obtained by a coupling reaction analogously to Example 32.

                  TABLE 4     ______________________________________     5 #STR99##                                       Colour shade     Ex. No.            D                 λ.sub.max nm                                       on polyester     ______________________________________     61            6 #STR100##       515 (CH.sub.3 CN)                                       Bluish-tinged red     62            7 #STR101##       516 (CH.sub.3 CN)                                       Bluish-tinged red     63            8 #STR102##       485 (CH.sub.3 CN)                                       Orange     64            9 #STR103##       483 (CH.sub.3 CN)                                       Orange     65            0 #STR104##       512 (CH.sub.3 CN)                                       Red     ______________________________________

Example 66 Preparation of the coupler component of the formula ##STR105##

1-Amyl-5-ethyl 3-amino-2-cyano-pentenedioate ##STR106## was prepared analougously to Ivanov J. C. et al., Liebigs Ann. Chem. 1983, 753-60 and Mittelbach M. und Juneck H. Liebigs Ann. Chem. 1986, 533-544, by reaction of ethyl 3-amino-ethoxy-2-propenoate hydrochloride with amylcyanoacetate in chloroform in the presence of triethylamine. Further reaction with ethyl acetoacetate analogously to Example 33 gave the coupler component of the above formula.

Example 67 Preparation of the dyestuff of the formula ##STR107##

The dyestuff of the above formula was obtained by diazotization of 2-nitro-4-methoxyaniline in hydrochloric acid with 30% strength nitrite solution at 0° C. and subsequent coupling with the coupling component according to Example 66. It dyed polyester in a brilliant red with good fastness properties.

MS, m/z (%): 514 (28), M⁺. +H!, 513 (100) M⁺. ! 399 (12), 370 (26), 168 (29), 43 (36)

λ_(max) : 515 nm (CH₃ CN)

Example 68 Preparation of the mixture of couplers of the formula ##STR108##

395 g of diamyl 3-amino-2-cyano-pentenedioate (78.7% according to GC) were heated together with 258 ml of ethyl acetoacetate and 154 ml of diazobicycloundecane at 80° C./60 mbar for 8 hours, readily volatile components being destilled off. The excess acetoacetic ester was distilled off under 0.5 mbar/100° C. The brown oil (644 g) which remained was employed directly for the coupling reaction.

MS, m/z (%): 376 (14), M⁺. !, 334 (5) M⁺. !, 307 (5), 262 (12), 219 (23), 218 (22), 193 (15), 192 (67), 151 (48), 137 (20), 126 (27), 123 (27), 98 (19), 96 (17), 71 (20), 55 (33), 43 (100)

The dyestuff of the formula ##STR109## listed on the following Table 5 were obtained by coupling analogously to Example 32 with coupling components which are accessible analogously to the Examples 33, 60, and 68.

                                      TABLE 5     __________________________________________________________________________                                           Shade     Ex.                              λ.sub.max                                           on     No.        D             R.sup.1                            R.sup.2                                  R.sup.3                                      (nm) polyester     __________________________________________________________________________     69        1 #STR110##   C.sub.5 H.sub.11                            C.sub.5 H.sub.11 80                                  CH.sub.3 20                                      515 (CH.sub.3 CN)                                           Bluish-tinged red     70        2 #STR111##   C.sub.5 H.sub.11                            C.sub.5 H.sub.11 85                                  C.sub.2 H.sub.5 15                                      515 (CH.sub.3 CN)                                           Bluish-tinged red     71        3 #STR112##   C.sub.5 H.sub.11                            C.sub.5 H.sub.11 85                                  C.sub.2 H.sub.5 15                                      516 (CH.sub.3 CN)                                           Bluish-tinged red     72        4 #STR113##   C.sub.4 H.sub.9                            C.sub.4 H.sub.9 80                                  CH.sub.3 20                                      515 (CH.sub.3 CN)                                           Bluish-tinged red     73        5 #STR114##   C.sub.4 H.sub.9                            C.sub.4 H.sub.9 80                                  CH.sub.3 20                                      516 (CH.sub.3 CN)                                           Bluish-tinged red     74        6 #STR115##   C.sub.4 H.sub.9                            C.sub.4 H.sub.9 80                                  C.sub.2 H.sub.5 20                                      515 (CH.sub.3 CN)                                           Bluish-tinged red     75        7 #STR116##   C.sub.4 H.sub.9                            C.sub.4 H.sub.9 80                                  C.sub.2 H.sub.5 20                                      516 (CH.sub.3 CN)                                           Bluish-tinged red     76        8 #STR117##   C.sub.4 H.sub.9                            C.sub.4 H.sub.9 80                                  C.sub.2 H.sub.5 20                                           Rot     77        9 #STR118##   C.sub.4 H.sub.9                            C.sub.4 H.sub.9 80                                  C.sub.2 H.sub.5 20                                           Red     78        0 #STR119##   C.sub.4 H.sub.9                            C.sub.4 H.sub.9 80                                  C.sub.2 H.sub.5 20                                           Red     79        1 #STR120##   C.sub.4 H.sub.9                            C.sub.4 H.sub.9 80                                  C.sub.2 H.sub.5 20                                           Ruby     80        2 #STR121##   C.sub.3 H.sub.7                            C.sub.3 H.sub.2 80                                  C.sub.2 H.sub.5 20                                      515 (CH.sub.3 CN)                                           Bluish-tinged red     81        3 #STR122##   C.sub.2 H.sub.5                            C.sub.4 H.sub.9 80                                  C.sub.4 H.sub.9 20                                      516 (CH.sub.3 CN)                                           Bluish-tinged red     82        4 #STR123##   CH.sub.3                            C.sub.4 H.sub.9 80                                  C.sub.4 H.sub.9 20                                      515 (CH.sub.3 CN)                                           Bluish-tinged red     83        5 #STR124##   C.sub.6 H.sub.13                            C.sub.6 H.sub.13 80                                  C.sub.2 H.sub.5 20                                      515 (CH.sub.3 CN)                                           Bluish-tinged red     84        5 #STR125##   C.sub.8 H.sub.17                            C.sub.8 H.sub.17 85                                  C.sub.2 H.sub.5 20                                      515 (CH.sub.3 CN)                                           Bluish-tinged red     85        5 #STR126##   C.sub.2 H.sub.4 OCH.sub.3                            C.sub.2 H.sub.4 OCH.sub.3 90                                  CH.sub.3 10                                      515 (CH.sub.3 CN)                                           Bluish-tinged red     86        5 #STR127##   C.sub.2 H.sub.4 OC.sub.2 H.sub.5                            C.sub.2 H.sub.4 OC.sub.2 H.sub.5                                  C.sub.2 H.sub.5 10                                      515 (CH.sub.3 CN)                                           Bluish-tinged red     __________________________________________________________________________

Example 87 Preparation of the dyestuffs of the formula ##STR128##

The coupling component was prepared by reaction of dimethylacetonedicarboxylate with dimethyl 3-amino-2-cyano-pentenedioate in the presence of DBU at 100° C. analogously to Example 68. Coupling with diazotized 2-nitro4-ethoxy-aniline gave the dyestuff of the above formula.

MS, m/z (%): 515 (100) M⁺. !, 516 (27), 457 (20), 456 (19), 425 (8), 424 (36), 153 (12)

The dyestuff dyed polyester in a bluish-tinged red with good fastness properties.

Example 88 Preparation of the dyestuff of the formula ##STR129##

The coupling component was prepared analogously to Example 68 by reaction of ethyl benzoylacetate with diamyl 3-amino-2-cyano-pentenedioate. Subsequent coupling with diazotized 2-nitro-4-methoxyaniline in methanol gave the dyestuff of the above formula in crystalline form.

The dyestuff dyed polyester in a bluish-tinged red with good fastness properties.

MS, m/z (%): 514 (28) M⁺. +H!, 513 (100) M⁺. !, 471 (6), 443 (6), 399 (12), 370 (26), 168 (29), 43 (36)

λ_(max) : 497 nm (CH₃ CN)

The following dyestuffs of the formula ##STR130## were obtained analogously to Example 88.

                                      TABLE 6     __________________________________________________________________________     Ex. No.          D               λ.sub.max nm                                Shade on polyester     __________________________________________________________________________     89          6 #STR131##     470 (CH.sub.3 CN)                                Scarlet     90          7 #STR132##     493 (CH.sub.3 CN)                                Red     91          8 #STR133##           Bluish-tinged red     __________________________________________________________________________

Example 92 Preparation of the coupler of the formula ##STR134##

49.5 g of 3-amino-2-methoxycarbonyl-2-pentenedinitrile (H. Junek et al., Synthesis 1977, 560) were heated at the boiling point under reflux with 47 g of ethyl acetoacetate and 30.6 g of piperidine in 300 ml of ethanol for 13 hours. After cooling, the mixture was diluted to a volume of 1.8 l with ice-water and brought to pH=2 with concentrated hydrochloric acid, and the product was filtered off with suction and washed with water. Yield 59 g.

MS, m/z (%): 232 (5), 231 (24) M⁺. !, 187 (42), 172 (36), 160 (14), 144 (21), 132 (13), 92 (26), 91 (29), 84 (23), 59 (100)

¹ H-NMR (d₆ -DMSO, 300 MHz, ppm): δ=2.15 (s, 3H, CH₃), 3.60 (s, 3H, OCH₃), 5.70 (s, 1H, 5-H), 8.25 (s, (br), 1H, N-H), 12.65 (s, 1H, O-H)

The following dyestuffs of the formula ##STR135## were prepared analogously to Example 32 using coupling components of Example 92 or homologous coupling components.

                  TABLE 7     ______________________________________     Ex.                                   Shade on     No.  D                 R       λ.sub.max                                           polyester     ______________________________________     93          5 #STR136##       CH.sub.3                                    520 (CH.sub.3 CN)                                           Bluish- tinged red     94          3 #STR137##       CH.sub.3       Ruby     95          5 #STR138##       C.sub.4 H.sub.9                                           Bluish- tinged red     96          5 #STR139##       C.sub.5 H.sub.11                                           Bluish- tinged red     97          1 #STR140##       CH.sub.3       Orange     98          9 #STR141##       CH.sub.3                                    443 (NMP)                                           Scarlet     99          0 #STR142##       CH.sub.3       Ruby     ______________________________________

                  TABLE 8     ______________________________________     Dyestuffs of the formula     1 #STR143##                                           Shade on     Ex. No.            D               R       λ.sub.max                                           polyester     ______________________________________     100            2 #STR144##     C.sub.2 H.sub.5                                           Bluish- tinged red     101            3 #STR145##     C.sub.2 H.sub.5                                    522 (NMP)                                           Red     102            4 #STR146##     C.sub.2 H.sub.5                                           Bluish- tinged red     103            5 #STR147##     C.sub.2 H.sub.5                                           Reddish- tinged orange     104            6 #STR148##     C.sub.2 H.sub.5                                    487 (CH.sub.3 CN)                                           Reddish tinged orange     105            7 #STR149##     C.sub.5 H.sub.11                                           Bluish- tinged red     106            8 #STR150##     C.sub.6 H.sub.13                                           Bluish- tinged red     ______________________________________

Example 107 Preparation of the coupler of the formula ##STR151##

The preparation proceeded analogously to Example 66 by reaction of ethyl 3-amino-4,4-dicyano-3-butenoate (Mittelbach M. and Junek H., Liebigs Ann. Chem. 1986, 533-544) with ethyl acetoacetate.

Example 108 Preparation of the mixture of the couplers of the formula ##STR152##

0.25 mol of diethyl 3-amino-2-cyano-pentenediaote ("dimeric ethyl cyanoacetate"), 0.35 mol of methyl trifluoroacetoacetate and 0.25 mol of diazabicycloundecene were heated at 120° C. in 250 ml of dimethylformamide for 12 hours. The solution was topped up to 400 ml with dimethylformamide and employed directly for the coupling reaction. A concentrated sample gave the following mass spectrum.

MS, m/z (%): 346 (1) M⁺. X=CO₂ C₂ H₅ !, 301 (2), 275 (3), 274 (9), M⁺. X=H!, 255 (7), 246 (5), 203 (11), 202 (89), 184 (14), 173 (20), 152 (44), 123 (27), 96 (27), 29 (100)

                                      TABLE 9     __________________________________________________________________________     9 #STR153##                                 λ.sub.max     Ex. No.         D             X      R  (nm)                                    Shade on polyester     __________________________________________________________________________     108         0 #STR154##   H (90) CO.sub.2 C.sub.2 H.sub.5 (10)                              C.sub.2 H.sub.5                                 511                                    Bluish-tinged red     109         1 #STR155##   H (90) CO.sub.2 C.sub.2 H.sub.5 (10)                              C.sub.2 H.sub.5                                 512                                    Bluish-tinged red     110         2 #STR156##   H (95) CO.sub.2 CH.sub.3 (5)                              CH.sub.3                                 486                                    Orange     111         3 #STR157##   H (95) CO.sub.2 CH.sub.3 (5)                              CH.sub.3                                 474                                    Orange     112         4 #STR158##   H (100)                              CH.sub.3                                    Bluish-tinged red     __________________________________________________________________________      MS, m/z (%): 409 (24), 408 (100)  M.sup.+ !, 275 (6), 135 (12), 120 (19),      108 (27), 93 (17), 65 (11), 58 (17)      .sup.1 HNMR (d.sub.6 -DMF, 300 MHz, ppm): δ = 1.5(t, 3H, OCH.sub.2      --CH.sub.3), 3.94(s, 3H, --OCH.sub.3), 4.3(q, 2H, OCH.sub.2 --CH.sub.3),      7.04(s, 1H, hetaromatic H), 7.18(m, 1H, aromatic H), 7.30(m, 2H, aromatic      H), 7.70(d, 1H, aromatic H), 11.95(s/br), 1H, N--H), 14.75(s, 1H, OH or      NH).

Example 113 Preparation of the dyestuff of the formula ##STR159##

A solution of 18.6 g of ethyl (2'-nitro-4'-ethoxy)-2-phenylazo-formyl acetate, 13.6 g of diethyl 3-amino-2-cyanopentenedioate and 9.1 g of diazabicycloundecene (DBU) in 60 ml of dimethylformamide was heated at 80° C. for 30 minutes. It was diluted with 120 ml of ethanol, 7.3 g of 30% strength hydrochloric acid and 18 ml of water. The precipitate formed was filtered off with suction and washed with ethanol. The dyestuff dyes polyester in a bluish-tinged red with good fastness properties.

UV: 520 nm (CH₃ CN), 538 nm (DMF)

Example 114 Preparation of the coupler of the formula ##STR160##

A solution of 7.8 g of 2-amino-3-cyanoindene, 6.8 g of sodium ethylate and 7.8 g of ethyl acetoacetate in 100 ml of ethanol was heated at the boiling point under reflux for 7 hours. The mixture was filtered with suction, the residue was dissolved in water, the solution was brought to pH=1 with hydrochloric acid and the product was filtered off with suction again.

MS, m/z (%): 222 (100) M⁺. !, 221 (5), 194 (6), 193 (10), 179 (7), 166 (7), 140 (4), 139 (4), 84 (8), 67 (5), 38 (5)

                  TABLE 10     ______________________________________     Dyestuffs of the formula     5 #STR161##                                       Shade on     Ex. No. D               λ.sub.max (nm)                                       polyester     ______________________________________     115             6 #STR162##     469 (CH.sub.3 CN)                                       Red-brown     116             7 #STR163##               Claret     ______________________________________

                  TABLE 11     ______________________________________     Dyestuffs of the formula     8 #STR164##                              λ.sub.max                                       Colour shade     Ex. No.  D               (nm)     on polyester     ______________________________________     117              9 #STR165##              Orange     118              0 #STR166##              Scarlet     119              1 #STR167##              Orange     ______________________________________

                  TABLE 12     ______________________________________     Dyestuffs of the formula     2 #STR168##                                     Colour shade     Ex. No.            D               λ.sub.max (nm)                                     on polyester     ______________________________________     120            3 #STR169##     415 (CH.sub.3 CN)                                     Greenish-tinged yellow     121            4 #STR170##     562 (DMF)                                     Claret     ______________________________________

Example 122 Preparation of the coupler of the formula ##STR171##

4.3 g of 1-methyl-6-chloro-pyrid-2-one were added to a suspension of 1.8 g of 80% strength sodium hydride in 30 ml of dimethylformamide, and 8.5 g of butyl cyanoacetate were added dropwise in the course of 15 minutes. The temperature rose to 50° C. The mixture was stirred at 50° C. for a further 7 hours, cooled to 20° C. and diluted slowly to a volume of 200 ml with water. The mixture was brought to pH = 7 with hydrochloric acid and extracted with methylene chloride. This extract was discarded. The aqueous phase was brought to pH = 4 and ex- tracted again with methylene chloride. This extract was dried and concentrated. Yield: 2.0 g of oil.

MS, m/z (%): 249 (8), 248 (43) M⁻ !, 151 (12), 148 (100), 147 (11), 121 (16), 119 (22), 108 (20), 57 (74), 63 (41)

                  TABLE 13     ______________________________________     Dyestuffs of the formula     5 #STR172##                                     Colour shade     Ex. No.            D               λ.sub.max (nm)                                     on polyester     ______________________________________     123            6 #STR173##              Scarlet     124            7 #STR174##     515 (CH.sub.3 CN)                                     Bluish-tinged red     125            8 #STR175##              Orange     ______________________________________

Example 126 Preparation of the coupler of the formula ##STR176##

21.8 g of 2-cyanomethyl-benzothiazole and 18 g of 6-chloro-1-methyl-pyrid-2-one were added to a solution of 5 g of sodium hydroxide powder in 125 ml of dimethylformamide and the mixture was stirred at 40° C. for 6 hours. A further 1.8 g of 6-chloro-1-methyl-pyrid-2-one were subsequently added and the mixture was stirred at 40° C. for a further 8 hours. 300 ml of methylene chloride were added and the mixture was discharged onto 400 ml of water. 5.5 g of a crystalline crude product were filtered off with suction, the methylene chloride phase was discarded and the aqueous phase was brought to pH=5, after which a precipitate (B) again precipitated out, this being filtered off with suction and washed with water: 7.8 g yield (B).

MS, m/z (%): 282 (27), 281 (100) M⁺. !, 241 (20), 148 (91), 108 (50), 39 (51)

                  TABLE 14     ______________________________________     Dyestuffs of the formula     9 #STR177##                              λ.sub.max                                       Colour shade     Ex. No.  D               (nm)     on polyester     ______________________________________     127              0 #STR178##              Claret     128              1 #STR179##              Claret     ______________________________________

Example 129 Preparation of the coupler of the formula ##STR180##

A mixture of 37.4 g of 2,6-dichloropyridine and 47.5 ml of dimethyl sulphate was stirred at 100° C. for 24 hours. After cooling, it was diluted with 75 ml of dimethylformamide, and a solution of 16.5 g of malononitrile in 25 ml of dimethylformamide and then 86.6 ml of triethylamine were added dropwise, while cooling with ice. The mixture was subsequently stirred for 20 hours and 14.7 g of a yellow product of the formula ##STR181## were then filtered off with suction. A further 4 g were to be obtained by dilution of the filtrate with ice-water and acidification to pH=1.

MS (CI), m/z (%): 194 (35), 192 (100) M⁺. !, 158 (32)

76.6 g of 1-methyl-6-chloro-2(1)-pyridinylidene!malononitrile were stirred in 400 ml of water and 400 ml of N-methylpyrrolidone at 80° C. for 10 hours and at 90° C. for 5 hours, pH=10 being maintained by dropwise addition of 30% strength sodium hydroxide solution via a titrator. The mixture was topped up to a volume of 1200 ml with water and brought to pH=1 with concentrated hydrochloric acid, and the product was filtered off with suction and washed with water. Yield: 63.5 g.

MS, m/z (%): 173 (100) M⁺. !, 146 (25), 145 (37), 144 (37), 130 (14), 119 (25), 118 (33), 108 (45), 39 (58).

¹ H-NMR (d₆ -DMSO, 300 MHz, ppm): δ=3.73 (s, 3H, N-CH₃), 6.15 (d, I=7.5 Hz, 1H, 5-H), 6.53 (d, I=7.5 Hz, 1H, 3-H), 7.48 (dd, I=7.5 Hz, 1H, 4-H), 11.80 (s(br), OH, H₂ O).

                  TABLE 15     ______________________________________     Dyestuffs of the formula     2 #STR182##                                        Colour                               λ.sub.max                                         shade on     Ex. No.           D                   (nm)     polyester     ______________________________________     130           3 #STR183##         516 (CH.sub.3 CN)                                        Bluish- tinged red     131           4 #STR184##         517 (CH.sub.3 CN)                                        Bluish- tinged red     132           5 #STR185##                  Orange     133           6 #STR186##         490 (CH.sub.3 CN)                                        Scarlet     134           7 #STR187##                  Orange     135           8 #STR188##         498 (CH.sub.3 CN)                                        Yellow- tinged red     136           9 #STR189##         485 (CH.sub.3 CN)                                        Orange     137           0 #STR190##                  Orange     138           1 #STR191##         477 (CH.sub.3 CN)                                        Orange     139           2 #STR192##                  Scarlet     ______________________________________

                                      TABLE 16     __________________________________________________________________________     Dyestuffs of the formula     3 #STR193##     Ex. No.         D           A.sup.1                        A.sup.2                          A.sup.5                             λ.sub.max (nm)                                  Colour shade on polyester     __________________________________________________________________________     140         4 #STR194## H  H C.sub.2 H.sub.5                             516 (CH.sub.3 CN)                                  Bluish-tinged red     141         5 #STR195## CH.sub.3                        H CH.sub.3                             508  Yellowish-tinged red     142         6 #STR196## CH.sub.3                        CN                          CH.sub.3                                  Bluish-tinged red     143         7 #STR197## H  H C.sub.3 H.sub.7                             516  Bluish-tinged red     144         8 #STR198## H  H C.sub.4 H.sub.9                             516  Bluish-tinged red     __________________________________________________________________________

                  TABLE 17     ______________________________________     Dyestuffs of the formula     9 #STR199##                              λ.sub.max                                       Colour shade     Ex. No.  D               (nm)     on polyester     ______________________________________     145              0 #STR200##              Red     146              1 #STR201##              Red     147              2 #STR202##              Red     148              3 #STR203##              Red     ______________________________________

Example 149 Preparation of a coupler ##STR204##

15.7 g of benzenesulphonamide were added to a solution of 5.4 g of sodium methylate in 120 ml of methanol and the mixture was boiled under reflux for 2 hours, the benzenesulphonamide dissolving. The solution was concentrated to dryness, the residue was dissolved in 75 ml of N-methylpyrrolidone and a solution of 19.2 g of 1-methyl-6-chloro-2(1H)-pyridinylidene!malononitrile (see Example 129) in 75 ml of N-methylpyrrolidone was allowed to run in. After 20 hours at room temperature, a further 2.7 g of sodium methylate and 3.9 g of benzenesulphonamide were added and the mixture was heated at 50° C. for 5 hours and stirred at room temperature for 60 hours. It was diluted with 600 ml of ice-water and brought to pH=1 with hydrochloric acid, and the product was filtered with suction and washed with water. Yield 15 g.

¹ H-NMR (d₆ -DMSO, 300 MHz, ppm): δ=3.75 (s, 3H, N-CH₃), 6.38 (d, I=7.5 Hz, 1H, heterocyclic H), 6.45 (d, I=7.5 Hz, 1H, heterocyclic H), 7.30 (dd, I=7.5 Hz, 1H, heterocyclic H), 7.53 (m, 3H, aromatic H), 7.78 (m, 2H, aromatic H), 9.48 (s(br), 1H, N-H).

                  TABLE 18     ______________________________________     Dyestuffs of the formula     1 #STR205##                            λ.sub.max                                    Colour shade     Ex. No.            D               (nm)    on polyester     ______________________________________     150            2 #STR206##             Bluish-tinged red     151            3 #STR207##             Yellowish-tinged red     ______________________________________

Example 152

10 g of polyester fabric are introduced at a temperature of 60° C. into 200 ml of a dye liquor which comprises 0.3% of the finely dispersed dyestuff of Example No. 134, based on the polyester fabric, and in which the pH is adjusted to 4.5 by means of acetic acid. The fabric is treated at 60° C. for 5 minutes, the temperature of the liquor is then increased to 135° C. in the course of 30 minutes and kept at this temperature for 60 minutes, and the liquor is then allowed to cool to 60° C. in the course of 20 minutes.

Thereafter, the dyed polyester fabric is purified reductively by being treated at 65° C. for 15 minutes in 200 ml of a liquor which comprises 5 ml/l of 32% strength by weight sodium hydroxide solution, 3 g/l of sodium dithionite and 1 g/l of an addition product of 48 ml of ethylene oxide on 1 mol of castor oil. Finally, the fabric is rinsed, neutralized with dilute acetic acid, rinsed again and dried. A brilliant orange dyeing with good fastness properties is obtained. 

What is claimed is:
 1. A compound of the formula (V) ##STR208## wherein E is a substituent which is replaceable by electrophilic substitutionX is O, NH, NT, NCOT, NCO₂ T or NSO₂ T, A¹ and A² independently of one another denote H or a radical of the formula T, -COH, -CO-T, -CO₂ -T, -CN, -CONH₂, -CONHT, -CONT₂, CF₃, -NO₂, NO, -SO₂ T, -OH, -OT, OCOT, -OCO₂ T, OSO₂ T, Cl, Br or I,wherein T is T¹, T², T³, T⁴ or T⁵, where T¹ =alkyl, cycloalkyl or aralkyl, T² =alkenyl, T³ =alkinyl, T⁴ =aryl, T⁵ =hetaryl, A³ and A⁴ independently of one another are, -CN, -CO₂ T, -CONH₂, -CONHT, -CONT₂, CF₃, -CHO, -COT, -SO₂ T, -SO₃ T⁴, -SO₃ T⁵, -SO₂ NH₂, SO₂ NHT, -SO₂ NT₂, -SOT, -CH═NH, -CH═NT, -CT═NH, -CT═NT, ##STR209## -CO-CO₂ T, -NO₂, -NO, -T⁴ or T⁵, wherein A³ and A⁴ do not simultaneously represent T⁴ or T⁵, or T⁴ and T⁵, or A³ and A⁴, together with the C atom to which they are bonded, represent a cyclic methylene-active compound of the formula (IIa) to (IIv), where these radicals are shown in the form of ##STR210## wherein V¹ represents H, Cl, Br, CH₃, -CO₂ T¹, -CN, -NO₂, -CF₃ or -SO₂ T¹, A⁵ represents H or a radical of the formula T, -OT¹, -NH₂, -NHT, -NT₂, -NHCOH, -NHCOT, -N═CH-T, -N═CT₂ or NHSO₂ T, or A¹ and A² or A² and A³, together with the particular atoms in between, form an unsaturated, unsubstituted or substituted 5- or 6-membered carbo- or heterocyclic radical, where, in the case of ring formation with participation of one of the radicals A³ or A⁴, the other particular radical is defined above, and where the radicals A¹ to A⁵ do or do not contain one or more SO₃ H, COOH or K and B groups, wherein K and B have the above meanings.
 2. A process for the preparation of a compound of the formula (V) of claim 1 in the form of the compound Va or Vb, wherein X represents O or NH, wherein acetic acid derivatives of the formula IXa or IXb are reacted with enamines of the formula (VIII) ##STR211## wherein A¹ and A² independently of one another denote H or H or a radical of the formula -T, -COH, -CO-T, -CO₂ -T, -CN, CONH₂, -CONHT, -CONT₂, -CF₃, -NO₂, -NO, -SO₂ T, -OH, -OT, OCOT, -OCO₂ T, OSO₂ T-, Cl, Br or I.A³ and A⁴ independently of one another are -CN, -CO₂ T, -CONH₂, -CONHT, -CONT₂ -, CF₃, -CHO, -COT, -SO₂ T, -SO₃ T⁴, -SO₃ T⁵, -SO₂ NH₂ -, SO₂ NHT, -SO₂ NT₂, -SOT, -CH═NH, -CH═NT, -CT═NH, -CT═NT, ##STR212## -CO-CO₂ T, -NO₂, -NO, T⁴ or T⁵, wherein A³ and A⁴ do not simultaneously represent T⁴ or T⁵ or T⁴ and T⁵, or A³ and A⁴, together with the C atom to which they are bonded, represent a cyclic methylene-active compound of the formula (IIa) to (IIv), where these radicals are shown in the form of ##STR213## wherein V¹ represents H, Cl, Br, CH₃, -CO₂ T¹, -CN, -NO₂, -CF₃ or -SO₂ T¹, A⁵ represents H or a radical of the formula T, -OT¹, -NH₂, -NHT, -NT₂, -NHCOH, -NHCOT, -N═CH-T, -N═CT₂ or NHSO₂ T,wherein T represents T¹ to T⁵, T¹ =alkyl, cycloalkyl or aralkyl, T² =alkenyl, T³ =alkinyl, T⁴ =aryl, T⁵ =hetarylor at least one pair of A¹ and A², A² and A³ and A⁴ and A⁵,together with the particular atoms in between, form an unsaturated, unsubstituted or substituted 5- or 6-membered carbo- or heterocyclic radical, with the proviso that if a ring is formed with participation of one of the two radicals A³ and A⁴, the radical which does not participate is defined above, X represents O, NH, NT, NCOT, NCO₂ T or NSO₂ T, E represents a substituent which is replaceable by electrophilic substitution, G¹ denotes O, NH or NT and G² represents OT, NH₂ or NHT, wherein T has the above meaning.
 3. Process for the preparation of compounds of the formula V which correspond to the formula X, wherein trifluoroacetic esters of the formula (XI) are subjected to a condensation reaction with dimeric cyanoacetic acid esters of the formula (XII) ##STR214## wherein T¹ is alkyl, cycloalky or aralkyl.
 4. A process for the preparation of a compound of the formula (V) ##STR215## wherein A⁵ represents T¹, T² or T³, wherein a pyridium salt of the formula (XIII) ##STR216## wherein A¹ and A² independently of one another denote H or a radical of the formula T, -COH, -CO-T, -CO₂ -T, -CN, -CONH₂, -CONHT, -CONT₂, -CF₃, -NO₂, NO, -SO₂ T, -OH, -OT, OCOT, -OCO₂ T, OSO₂ T, Cl, Br or I,A³ and A⁴ independently of one another denote an electron-withdrawing radical, or, together with the common C atom, form a cyclic methylene-active compound, -CN, -CO₂ T, -CONH₂, -CONHT, -CONT₂, -CF₃, -CHO, -COT, -SO₂ T , SO₃ T⁴, -SO₃ T⁵, -SO₂ NH₂, -SO₂ NHT, -SO₂ NT₂, -SOT, -CH═NH, -CH═NT, -CT═NH, -CT═NT, ##STR217## -CO-CO₂ T, -NO₂, -NO, T⁴ or T⁵, wherein A³ and A⁴ do not simultaneously represent T⁴ or T⁵ or T⁴ and T⁵, or A³ and A⁴, together with the C atom to which they are bonded, represent a cyclic methylene-active compound of the formula (IIa) to (IIv). where these radicals are shown in the form of ##STR218## wherein V¹ represents H, Cl, Br, CH₃, -CO₂ T¹, -CN, -NO₂, -CF₃ or SO₂ T¹,or at least one pair of A¹ and A², A² and A³ and A⁴ and A⁵,together with the particular atoms in between, form an unsaturated, unsubstituted or substituted 5- or 6-membered carbo- or heterocyclic radical, with the proviso that if a ring is formed with participation of one of the two radicals A³ and A⁴, the radical which does not participate is defined above, E represents a substituent is be replaceable by electrophilic substitution, An.sup.⊖ is an anion, T represents T¹ to T⁵, T¹ =alkyl, cycloalkyl or aralkyl, and, where T² =alkenyl, T³ =alkinyl, T⁴ =aryl, T⁵ =hetaryl Y¹ and Y² independently of one another represent, F, Cl, Br, I, -OSO₂ T, -OT, -ST or -SO₂ Tis reacted with a compound of the formula (II) ##STR219## wherein A³ and A⁴ are defined above independently of one another are denote an electron-withdrawing radical, or, together with the common C atom, form a cyclic methylene-active compound, A⁵ represents H or a radical of the formula T, -OT¹, -NH₂, -NHT, -NT₂, -NHCOH, -NHCOT, -N═CH-T, -N═CT₂ or NHSO₂ T,wherein T¹ =alkyl, cycloalkyl or aralkyl, and T represents T¹ or can assume the meaning of T² to T⁵, where T² =alkenyl, T³ =alkinyl, T⁴ =aryl, T⁵ =hetarylor at least one pair of A¹ and A² A² and A³ and A⁴ and A⁵, together with the particular atoms in between, form an unsaturated, unsubstituted or substituted 5- or 6-membered carbo- or heterocyclic radical, with the proviso that if a ring is formed with participation of one of the two radicals A³ and A⁴, the radical which does not participate is defined above, X represents O, NH, NT, NCOT, NCO₂ T or NSO₂ T,to give a compound of the formula (XIV) ##STR220## and this is reacted with compounds of the formula (XV)

    XH.sub.2                                                   (XV)

wherein X represents O, NH, NT¹, NCO₂ T or NSO₂ T,to give a compound of the formula (V).
 5. The process according to claim 4, wherein Y¹ and Y² independently from another represent F, Cl, I, -OSO₂ T, -OT, -ST or -SO₂ T.
 6. The process according to claim 4, whereinAn.sup.⊖ represents Cl.sup.⊖, Br.sup.⊖, I.sup.⊖, T¹ OSO₃.sup.⊖ or TSO₃.sup.⊖.
 7. A process for the preparation of the coupling components of the formula (V), wherein A⁵ represents T, wherein a pyridine derivative of the formula (XVII) is reacted with a compound of the formula (II): ##STR221## wherein X=O, A¹ and A² independently of one another denote H or a radical of the formula -T, -COH, -CO-T, -CO₂ -T, -CN, -CONH₂, -CONHT, -CONT₂, -CF₃, -NO₂, -NO, -SO₂ T, -OH, -OT, -OCOT, -OCO₂ T, -OSO₂ T, Cl, Br or I,A³ and A⁴ independently of one another are -CN, -CO₂ T, -CONH₂, -CONHT, -CONT₂, -CF₃, -CHO, -COT, -SO₂ T, -SO₃ T⁴, -SO₃ T⁵, -SO₂ NH₂, -SO₂ NHT, -SO₂ NT₂, SOT, -CH═NH, -CH═NT, -CT═NH, -CT═NT, ##STR222## -CO-CO₂ T, -NO₂, -NO, T⁴ or T⁵, wherein A³ and A⁴ do not simultaneously represent T⁴ or T⁵ or T⁴ and T⁵, or A³ and A⁴, together with the C atom to which they are bonded, represent a cyclic methylene-active compound of the formula (IIa) to (IIv), where these radicals are shown in the form of ##STR223## wherein V¹ represents H, Cl, Br, CH₃, -CO₂ T¹, -CN, -NO₂, -CF₃ or -SO₂ T¹, and A⁵ represents T and T represents T¹ to T⁵, where T¹ =alkyl, cycloalkyl or aralkyl, T² =alkenyl, T³ =alkinyl, T⁴ =aryl, T⁵ =hetarylor at least one pair of A¹ and A², A² and A³ and A⁴ and A⁵,together with the particular atoms in between, form an unsaturated, unsubstituted or substituted 5- or 6-membered carbo- or heterocyclic radical, with the proviso that if a ring is formed with participation of one of the two radicals A³ and A⁴, the radical which does not participate is defined above E represents a substituent which is replaceable by electrophilic substitution.
 8. A process for the preparation of a compound of the formula (V) which corresponds to the formula (XX), wherein A⁵ represents T¹, T² or T³, wherein 2-methylpyridone of the formula (XVIII) is reacted with phthalic acid esters of the formula (XIX) in the presence of a base ##STR224## wherein A¹ represents H, T, -COH, -COT, -CO₂ T, -CN, -CONH₂, -CONHT, -CONT₂, CF₃, OH or halogen,A² represents H, T, -COH, -COT, -CN, -CO₂ T, -CONH₂, -CONHT, -CONT₂, -CF₃, -NO₂, -NO, Cl, Br or I, A⁵ represents H or a radical of the formula T, -OT¹, -NH₂, -NHT, -NT₂, -NHCOH, -NHCOT, -N═CH-T, -N═CT₂ or NHSO₂ T, T¹ denotes C₁ -C₁₀ -alkyl, C₅ -C₇ -cycloalkyl or C₆ -C₁₀ -aryl-C₁ -C₆ -alkyl, which are unsubstituted or substituted by one or more substituents from the group consisting of -OH, -C₁ -C₁₀ -alkoxy, -O{(CH₂)₂₋₁₀ -O}₁₋₆ -alkyl, -OCOT, -OSO₂ T, -O-(CH2 CH₂ O)₁₋₆ COT, -COT, -SO₂ T, -CO₂ T, -CN, -CO₂ H, -CONT₂, -CF₃, Cl, Br and I, T represents T^(1'), T², T³, T⁴ or T⁵, T^(1') =alkyl, cycloalkyl or aralkyl, T² =alkenyl, T³ =alkinyl, T⁴ =aryl, T⁵ =hetaryl E represents a substituent which is replaceable by electrophilic substitution and V¹ represents H or a substituent.
 9. The process as claimed in claim 8, wherein is T¹ is -C₁ -C₁₀ -alkoxy-C₂ -C₅ -alkoxy, -C₁ -C₅ -alkoxy-C₂ -C₅ -alkoxy-C₂ -C₅ -alkoxy or -O-(CH₂ -CH₂ O)₁₋₆ -alkyl. 